8 responses to “Beginners Column

  1. Hi sir am a mechanical students and I have a new project for mosquitoes killer project details for one uv light 8w,56v,0.145a and mosquitoes bat mesh then it’s only use for A/C current so I want this project pcb board design then these is my first project you can help me sir I am ITI students thank you. Email – amazon.jagan@gmail.com

  2. Dear Sir, I’m a civil man but interested in electronics too. I used put my finger in almost all the equipment which had its last breath.I used to analyse and learn things by browsing web pages.I have a question, recently when my mosquito bat failed to kill mosquito I opened it but could not figure it out where the problem. Charging and power button LEDs are working but no spark from the bat.Although its only 160 rupees my quest searching for the answer.May pl help me.Since I’m unable post any pic here I could not explain much.Thanks

  3. Dear sir, I am purely beginner in Electronics, by your forum and some internet help I gathered bit of knowledge on Electronics components and tried to tracing by multimeter like home using emergency light and some. Now i got more interest on electronics, So i wish to learn by practical for professional making, Let me know are u conducting any classes in chennai. Pls. and mail me.

  4. sir please email me the circuit of laser security system.the following item consists of the system
    laser
    relay
    buzzer
    2N3970
    5 K varible
    1000uF.
    please i am beginner so please explain me little thinks also.
    my email is dubeyenter@gmail.com
    please i beg u please explain

  5. Dear sir, I AM USING GEEPAS 230 VOLT AC RICE COOKER. AFTER COMPLETING THE RICE BOILED, IMMEDIATLY BUZZER SOUND COMING FOR FEW SECONDS FROM THE COOKER DEVICE.. THEY ARE NOT USING TIMER CIRCUITS. KINDLY LET ME KNOW HOW THIS BUZZER IS WORKING. I NEED THIS CIRCUIT PLEASE REPLY TO MY EMAIL ID ujjivanam54@gmail.com

    • Some Rice cookers use pressure switch to give Alarm. Pressure switch is like a break light switch. It has contact points inside which make contact when the steam enters into it with high pressure. The Buzzer circuit is connected through the contacts so that as long as contacts remain closed by the steam, buzzer beeps.

  6. thank you very much sir, its a great help for me and my whole class. its my great pleasure for giving and sharing your knowledge. God will bless you and Good good Day.

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